An auxiliary device dedicated to the determination of gas detector performance parameters
A gas detector and parameter measurement technology, applied in the field of measurement, can solve the problems of time-consuming and labor-intensive, and achieve the effect of solid technical support, simple operation, and miniaturization of the device
Active Publication Date: 2021-06-04
INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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Problems solved by technology
[0003] When traditionally inspecting the basic performance parameters of gas detectors such as leak rate, volume, memory effect and relative detection efficiency, it is necessary to repeatedly pump and inflate, which is time-consuming and labor-intensive. Moreover, due to the structural characteristics of the gas detector, precise control is required. Pressure range, overpressure is not allowed
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[0018] Attached below figure 1 The content of the present invention will be described in further detail.
[0019] Such as figure 1 As shown, the auxiliary device dedicated to the determination of gas detector performance parameters in the present invention includes: a steel cylinder group 1, an absolute pressure sensor 2, a buffer column 3 and a vacuum pump 4, and the components are connected by stainless steel pipes and valves, and the initial state of the valve is They are all in the closed state, wherein, the steel cylinder group 1, the absolute pressure sensor 2, the buffer column 3 and the gas detector are respectively located at one end of the cross interface; the steel cylinder group 1 includes four steel cylinders I11 and II12 arranged in parallel, Cylinders III13 and Cylinders IV14; the front end of the air inlet of cylinder group 1 is connected to an external gas source, which is a high-purity helium source or a calibrated normal-pressure radioactive xenon gas sampl...
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The invention discloses an auxiliary device specially used for measuring performance parameters of a gas detector. The device of the invention is mainly composed of a steel cylinder group, a pressure sensor, a buffer column and a vacuum pump; the device of the invention is used as a part of the basic performance parameters of a gas detector The auxiliary device for measurement adopts pipeline vacuum buffer technology, which can effectively carry out leak detection and volume calibration of gas detectors, and can efficiently clean, minimize the influence of memory effect on measurement, and the relative detection efficiency of filling calibration The required radioactive xenon gas samples; the device is miniaturized, the layout is reasonable, the operation is simple, time-saving and labor-saving, and satisfactorily solves the needs of gas detectors with a narrow pressure range, high pressure precision control and repeated operations, providing for the development of gas detectors It has a solid technical support.
Description
technical field [0001] The invention belongs to the technical field of measurement, and in particular relates to an auxiliary device specially used for measuring performance parameters of a gas detector. Background technique [0002] The xenon in the atmosphere is enriched by adsorption, separated and purified, and then measured for radioactivity. As the core component of the high-sensitivity radioactive xenon measurement system, the gas detector is mainly based on the test and investigation of the standard source and irradiated gas samples. Obtain basic performance parameters such as leak rate, energy resolution, pulse time characteristics, radioactive background, consistent detection efficiency, memory effect and minimum detectable activity, and judge whether the gas detector is usable and whether it can perform long-term extremely low Stable measurement of active radioactive xenon. [0003] When traditionally inspecting the basic performance parameters of gas detectors s...
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IPC IPC(8): G01N33/00G01M3/26G01B13/00B08B5/00
CPCB08B5/00G01B13/00G01M3/26G01N33/007
Inventor 侯建平王茜罗飞翁蔡平向永春古梅张伟田阔刘强龚有进吴晓楠
Owner INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF